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Marquise|Natural|GIA

1.21ct E SI1 Marquise Natural Diamond

ID • E/SI1 • GIA 2566159504

Certificate GIA 2566159504

Diamond specifications and retailer prices

From HK$46,600 HKD
$5,940 USD
As of November 5, 2026
1 retailer carries this diamond
Only listing: HK$46,600 HKD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2566159504. Listed at a single retailer as of November 5, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.21
Carat
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2566159504
Dimensions10.18 × 5.50 × 3.59 mm
L/W Ratio1.85
Top View
10.18 mm5.50 mm1.21 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2566159504
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: HK$46,600 HKD|Low: HK$46,600 HKD|High: HK$57,670 HKD|Avg: HK$52,596 HKD|-4.3%
Brilliant Earth
Retailer 2
October 26, 2026
Brilliant EarthHK$46,600 HKD
Retailer 2HK$57,670 HKD

4 data points across 2 retailers

1 retailer

B
Brilliant Earth
21200843A · Nov 5
HK$46,600 HKD
$5,940 USD
View

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B
1.21ct Marquise
HK$46,600 HKD